73K224BL
V.22bis, V.22, V.21, Bell 212A, 103
Single-Chip Modem w/ Integrated
Hybrid
Simplifying System Integration™
DATA SHEET
DESCRIPTION
The 73K224BL is a highly integrated single-chip
modem IC which provides the functions needed to
construct a V.22bis compatible modem, capable of
2400 bit/s full-duplex operation over dial-up lines. The
73K224BL is an enhancement of the 73K224L single-
chip modem, which adds the hybrid hook switch
control, and driver to the 73K224L. The 73K224BL
integrates analog, digital, and switched-capacitor
array functions on a single chip, offering excellent
performance and a high level of functional integration
in a 32-Lead PLCC package.
The 73K224BL operates from a single +5 V supply for
low power consumption.
The 73K224BL is designed to appear to the systems
designer as a microprocessor peripheral, and will
easily interface with popular single-chip micro-
processors (80C51 typical) for control of modem
functions through its 8-bit multiplexed address/data
bus or via an optional serial control bus. An ALE
control simplifies address demultiplexing. Data
communications normally occur through a separate
serial port.
(continued)
FEATURES
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Includes features of 73K224L single-chip
modem
On chip 2-wire/4-wire hybrid driver and off
hook relay buffer driver
One-chip multi-mode V.22bis/V.22/V.21 and
Bell 212A/103 compatible modem data pump
FSK (300 bit/s), DPSK (600, 1200 bit/s), or
QAM (2400 bit/s) encoding
Software compatible with other TERIDIAN
Semiconductor K-Series one-chip modems
Interfaces directly with standard
processors (80C51 typical)
Parallel or serial bus for control
Selectable
internal
buffer/debuffer
scrambler/descrambler functions
and
micro-
All asynchronous and synchronous operating
modes (internal, external, slave)
(continued)
BLOCK DIAGRAM
DTMF,
ANSWER,
GUARD &
CALLING
TONE
GENERATOR
FSK
MODULATOR
OH
BUFFER
SCRAMBLER
DI-BIT/
QUAD-BIT
ENCODER
8-BIT
µP
BUS
INTERFACE
FIR
PULSE
SHAPER
QAM/
DPSK
MODULATOR
FILTER
EQUALIZER
FILTER
ATTENUATOR
TXA1
2W/4W
HYBRID
DI-BIT/
QUAD-BIT
DECODER
DIGITAL
SIGNAL
PROCESSOR
RECEIVE
FUNCTIONS
FILTER
TXA2
RXA
DEBUFFER
DESCRAMBLER
A/D
EQUALIZER
FILTER
FILTER
FIXED
DEMODULATOR
AGC
TXD
RXD
SERIAL
INTERFACE
GAIN
BOOST
TONE
DETECTION
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©
2005, 2008 TERIDIAN Semiconductor Corporation
Rev 7.1
TERIDIAN [ TERIDIAN SEMICONDUCTOR CORPORATION ]
